Watchkit界面控制器38mm和42mm背景图像尺寸

Question

出于某种原因，我搜索了高和低，无法找到我需要为Watchkit中的38mm和42mm尺寸提供背景图像的确切图像尺寸。目前，我正在使用“缩放填充”扩展较小的图像。

我不希望它拉长，所以我要寻找真正的像素尺寸。

Answer 1

下面是我用于在我的WKInterfaceController中获取背景图像大小的代码。我的应用程序有一个页面控件，你可能不需要额外的-14。

-(CGSize)backgroundSize 
{ 
    CGRect contentFrame = self.contentFrame; 
    CGSize size = contentFrame.size; 
    CGFloat contentScale = 2.0; 
    size.width *= contentScale; 
    size.height *= contentScale; 

    //I lined up the generated image with one in the simulator until 
    //they perfectly matched. I did this on both 38 and 42 mm. 
    //I am not sure why they all came out to be off 4. 

    //There is an offset of 10 in IB and I am not sure I need this 
    //to be 4 to match perfect. 
    size.height -= 4; 

    //it looks like there is 2 pixels around the edge 
    size.width -= 4; 

    //Using page mode we need to take off an additional 14 pixels for the page dots at the bottom 
    size.height -= 14; 

    return size; 
}